Dear Stephen,
Thanks for using the Portfolio Manager.
Scaling can easily be modified. Just follow these steps:
1. Go to Portfolio Mnager > Settings > Advanced Tabs > Custom CSS box.
2. Paste the following:
.mosaic-view-three .eds-bpm-view-first:hover img {
transform: scale(2);
}
Here you can change the value of scale(2) according to your needs.
e.g. scale (1) is image at 100% (No scale)
scale (1.5) is image at 150% (large by 1.5 times)
scale (2) is image at 200% (twice the size)
...and so on
Please let me know if this works for you.